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Finding the Fourth Proportional to 7,609.78, 11,415.57 and 2,928.70

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Solution

The fourth proportional to 7,609.78, 11,415.57 and 2,928.70 is: 4,393.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,609.78 : 11,415.57 = 2,928.70 : x
  2. Step 2: Convert to fraction form
    7,609.78/11,415.57 = 2,928.70/x
  3. Step 3: Cross multiply
    7,609.78x = 11,415.57 × 2,928.70
  4. Step 4: Simplify right side
    7,609.78x = 33,432,779.86
  5. Step 5: Solve for x
    x = 33,432,779.86/7,609.78
  6. Step 6: Final answer
    x = 4,393.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.